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    Ground question XFMR

    New drawings submitted and my question is why is a ground not included between the transformer and 480volt gear. I drew in a green line where i feel the ground is needed. Thoughts/reasons why engineer left it out? Thank you Ground question.pdf

    #2
    That would be the supply side bonding jumper (SSBJ) and is required. It could be a metal raceway.
    Rob

    Moderator

    All responses based on the 2017 NEC unless otherwise noted

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      #3
      Great, so if these conductors were in EMT or Ridgid that would be sufficient. Can you supply me an article number.

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        #4
        250.118

        Roger
        Moderator

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          #5
          Roger 250.118 is equipment grounding conductors, does this relate to the supply side bonding jumper? Appreciate all the info

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            #6
            I should have also mentioned the last sentence of 250.30(A)(2)

            Roger
            Moderator

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